<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <!--
    ctrl+/ 开启、关闭注释    ctrl+shift+/
    hello world
    -->
    <br>
    <br>
    <b>hello world</b>
</body>
</html>